Malicious PDF — malware analysis report

Static analysis result for SHA-256 f073141e383eda89…

MALICIOUS

PDF

77.6 KB Created: 2021-08-08 05:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 84c0090a839483d938c942ab12ed8f72 SHA-1: 6799129a009b8aa6874fdef0ed2fa6b26cc2f598 SHA-256: f073141e383eda89ddae7ec12cf54173e529e47761e9e50ddc2cbb432e39406e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to lead the user to a malicious second stage.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6658

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://slezanie.eu/userfiles/file/kokawuzaxowoji.pdf In PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/80f74667c17da324af34419add713485/gorud.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/86173611347.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79782933e---jijebesedosoroxusetanepok.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f70ab17a53---goxojepuzuvedelijalifar.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/mpth4geunm3glnmeonvhp0fhoi/85574621051.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609de48809e4c---35093908713.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/afe23362f5bc302e4ddaea2c9827dda8/lebimesiludef.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/gosimupakowoxolosotokoluw.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608056ade3f3e---27610601140.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/f580b576c89afec8c8314108e8d62c19/10107160976.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/6de3939942ea2531e38ab33b85bd6b7f/vomadanugutunonibedekoj.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/62422037816.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/36665520608.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/vuvifufasiko.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8efcd21157---sipezivulanoke.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/83hhmoqdl4c18s2s37lsouq421/safewusogejijewaxobon.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074cb27c01ca---13786585734.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608060132745e---43507396619.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/vepakemununutimabokozu.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/67226650889.pdfIn PDF document text
    • http://sme1970reunion.com/clients/7/78/786f1e38e9ed540b4a7d4f5dbcc09398/File/xipejodexikefoset.pdfIn PDF document text
    • https://ptogel2.com/contents//files/pixabalekemotutumitijugo.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16087e7e1d3df2---bowibumimepamifuluminot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=super+one+click+root+apk+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF34 10692 bytes
SHA-256: 6700694efde31b4174516f7015f6e3bb6f19bc62b38d67f9cb1c112ef8521944
font_01_sfnt_off000107db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DB 17352 bytes
SHA-256: bea9da5a15f213519adccc39d95e5fc359bb7a3aa19146e3e15181b36baaba57